Malicious PDF — malware analysis report

Static analysis result for SHA-256 a520f5f65c6ba53e…

MALICIOUS

PDF

12.1 KB
MD5: 3546e236a8bb25c8eb1cc193c3b5cd28 SHA-1: 8d54f92c253a7712a16fd1f8fec780318572f4fa SHA-256: a520f5f65c6ba53e0f1bda894ecea4025c59639fbb5d83a3c2356d14982ff614
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the high ML classifier score strongly indicate malicious intent. The PDF contains an embedded file and an embedded script payload, suggesting it's designed to drop and execute further malware. The presence of XFA form elements and embedded URLs, while some are benign, are common in exploit-laden PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
6eb7ca4c79802d330d4c66141dd6805307cdd4804500639cb327929617b40593
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11660 bytes